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Camu camu, also called cacari and camocamo, is a small tree that grows alongside rivers in the western and central Amazon basin in South America. It bears purple, cherry-sized berries which, due to their extreme acidity, are typically sweetened into jams, jellies, and juices, rather than eaten raw. The berries have been utilized for medicinal purposes by Amazonian Indians for centuries, and were often made into hair tonics. Although they are not well-known fruits in…